1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
|
/** @file
Implementation of Managed Network Protocol public services.
Copyright (c) 2005 - 2007, Intel Corporation. <BR>
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "MnpImpl.h"
/**
Returns the operational parameters for the current MNP child driver. May also
support returning the underlying SNP driver mode data.
The GetModeData() function is used to read the current mode data (operational
parameters) from the MNP or the underlying SNP.
@param[in] This Pointer to the EFI_MANAGED_NETWORK_PROTOCOL instance.
@param[out] MnpConfigData Pointer to storage for MNP operational parameters. Type
EFI_MANAGED_NETWORK_CONFIG_DATA is defined in "Related
Definitions" below.
@param[out] SnpModeData Pointer to storage for SNP operational parameters. This
feature may be unsupported. Type EFI_SIMPLE_NETWORK_MODE
is defined in the EFI_SIMPLE_NETWORK_PROTOCOL.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_UNSUPPORTED The requested feature is unsupported in this
MNP implementation.
@retval EFI_NOT_STARTED This MNP child driver instance has not been
configured. The default values are returned in
MnpConfigData if it is not NULL.
@retval Others The mode data could not be read.
**/
EFI_STATUS
EFIAPI
MnpGetModeData (
IN EFI_MANAGED_NETWORK_PROTOCOL *This,
OUT EFI_MANAGED_NETWORK_CONFIG_DATA *MnpConfigData, OPTIONAL
OUT EFI_SIMPLE_NETWORK_MODE *SnpModeData OPTIONAL
)
{
MNP_INSTANCE_DATA *Instance;
EFI_SIMPLE_NETWORK_PROTOCOL *Snp;
EFI_TPL OldTpl;
EFI_STATUS Status;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = MNP_INSTANCE_DATA_FROM_THIS (This);
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
if (MnpConfigData != NULL) {
//
// Copy the instance configuration data.
//
CopyMem (MnpConfigData, &Instance->ConfigData, sizeof (*MnpConfigData));
}
if (SnpModeData != NULL) {
//
// Copy the underlayer Snp mode data.
//
Snp = Instance->MnpServiceData->Snp;
CopyMem (SnpModeData, Snp->Mode, sizeof (*SnpModeData));
}
if (!Instance->Configured) {
Status = EFI_NOT_STARTED;
} else {
Status = EFI_SUCCESS;
}
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Sets or clears the operational parameters for the MNP child driver.
The Configure() function is used to set, change, or reset the operational
parameters for the MNP child driver instance. Until the operational parameters
have been set, no network traffic can be sent or received by this MNP child
driver instance. Once the operational parameters have been reset, no more
traffic can be sent or received until the operational parameters have been set
again.
Each MNP child driver instance can be started and stopped independently of
each other by setting or resetting their receive filter settings with the
Configure() function.
After any successful call to Configure(), the MNP child driver instance is
started. The internal periodic timer (if supported) is enabled. Data can be
transmitted and may be received if the receive filters have also been enabled.
Note: If multiple MNP child driver instances will receive the same packet
because of overlapping receive filter settings, then the first MNP child
driver instance will receive the original packet and additional instances will
receive copies of the original packet.
Note: Warning: Receive filter settings that overlap will consume extra
processor and/or DMA resources and degrade system and network performance.
@param[in] This Pointer to the EFI_MANAGED_NETWORK_PROTOCOL instance.
@param[in] MnpConfigData Pointer to configuration data that will be assigned
to the MNP child driver instance. If NULL, the MNP
child driver instance is reset to startup defaults
and all pending transmit and receive requests are
flushed. Type EFI_MANAGED_NETWORK_CONFIG_DATA is
defined in EFI_MANAGED_NETWORK_PROTOCOL.GetModeData().
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is
TRUE:
* This is NULL.
* MnpConfigData.ProtocolTypeFilter is not
valid.
The operational data for the MNP child driver
instance is unchanged.
@retval EFI_OUT_OF_RESOURCES Required system resources (usually memory)
could not be allocated.
The MNP child driver instance has been reset to
startup defaults.
@retval EFI_UNSUPPORTED The requested feature is unsupported in
this [MNP] implementation. The operational data
for the MNP child driver instance is unchanged.
@retval EFI_DEVICE_ERROR An unexpected network or system error
occurred. The MNP child driver instance has
been reset to startup defaults.
@retval Others The MNP child driver instance has been reset to
startup defaults.
**/
EFI_STATUS
EFIAPI
MnpConfigure (
IN EFI_MANAGED_NETWORK_PROTOCOL *This,
IN EFI_MANAGED_NETWORK_CONFIG_DATA *MnpConfigData OPTIONAL
)
{
MNP_INSTANCE_DATA *Instance;
EFI_TPL OldTpl;
EFI_STATUS Status;
if ((This == NULL) ||
((MnpConfigData != NULL) &&
(MnpConfigData->ProtocolTypeFilter > 0) &&
(MnpConfigData->ProtocolTypeFilter <= 1500))) {
return EFI_INVALID_PARAMETER;
}
Instance = MNP_INSTANCE_DATA_FROM_THIS (This);
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
if ((MnpConfigData == NULL) && (!Instance->Configured)) {
//
// If the instance is not configured and a reset is requested, just return.
//
Status = EFI_SUCCESS;
goto ON_EXIT;
}
//
// Configure the instance.
//
Status = MnpConfigureInstance (Instance, MnpConfigData);
ON_EXIT:
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Translates an IP multicast address to a hardware (MAC) multicast address. This
function may be unsupported in some MNP implementations.
The McastIpToMac() function translates an IP multicast address to a hardware
(MAC) multicast address. This function may be implemented by calling the
underlying EFI_SIMPLE_NETWORK. MCastIpToMac() function, which may also be
unsupported in some MNP implementations.
@param[in] This Pointer to the EFI_MANAGED_NETWORK_PROTOCOL instance.
@param[in] Ipv6Flag Set to TRUE to if IpAddress is an IPv6 multicast address.
Set to FALSE if IpAddress is an IPv4 multicast address.
@param[in] IpAddress Pointer to the multicast IP address (in network byte
order) to convert.
@param[out] MacAddress Pointer to the resulting multicast MAC address.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_INVALID_PARAMETER One of the following conditions is TRUE:
* This is NULL.
* IpAddress is NULL.
* IpAddress is not a valid multicast IP
address.
* MacAddress is NULL.
@retval EFI_NOT_STARTED This MNP child driver instance has not been
configured.
@retval EFI_UNSUPPORTED The requested feature is unsupported in this
MNP implementation.
@retval EFI_DEVICE_ERROR An unexpected network or system error occurred.
@retval Others The address could not be converted.
**/
EFI_STATUS
EFIAPI
MnpMcastIpToMac (
IN EFI_MANAGED_NETWORK_PROTOCOL *This,
IN BOOLEAN Ipv6Flag,
IN EFI_IP_ADDRESS *IpAddress,
OUT EFI_MAC_ADDRESS *MacAddress
)
{
EFI_STATUS Status;
MNP_INSTANCE_DATA *Instance;
EFI_SIMPLE_NETWORK_PROTOCOL *Snp;
EFI_TPL OldTpl;
if ((This == NULL) || (IpAddress == NULL) || (MacAddress == NULL)) {
return EFI_INVALID_PARAMETER;
}
if (Ipv6Flag) {
//
// Currently IPv6 isn't supported.
//
return EFI_UNSUPPORTED;
}
if (!IP4_IS_MULTICAST (EFI_NTOHL (*IpAddress))) {
//
// The IPv4 address passed in is not a multicast address.
//
return EFI_INVALID_PARAMETER;
}
Instance = MNP_INSTANCE_DATA_FROM_THIS (This);
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
if (!Instance->Configured) {
Status = EFI_NOT_STARTED;
goto ON_EXIT;
}
Snp = Instance->MnpServiceData->Snp;
ASSERT (Snp != NULL);
if (Snp->Mode->IfType == NET_IFTYPE_ETHERNET) {
//
// Translate the IPv4 address into a multicast MAC address if the NIC is an
// ethernet NIC.
//
MacAddress->Addr[0] = 0x01;
MacAddress->Addr[1] = 0x00;
MacAddress->Addr[2] = 0x5E;
MacAddress->Addr[3] = (UINT8) (IpAddress->v4.Addr[1] & 0x7F);
MacAddress->Addr[4] = IpAddress->v4.Addr[2];
MacAddress->Addr[5] = IpAddress->v4.Addr[3];
Status = EFI_SUCCESS;
} else {
//
// Invoke Snp to translate the multicast IP address.
//
Status = Snp->MCastIpToMac (
Snp,
Ipv6Flag,
IpAddress,
MacAddress
);
}
ON_EXIT:
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Enables and disables receive filters for multicast address. This function may
be unsupported in some MNP implementations.
The Groups() function only adds and removes multicast MAC addresses from the
filter list. The MNP driver does not transmit or process Internet Group
Management Protocol (IGMP) packets. If JoinFlag is FALSE and MacAddress is
NULL, then all joined groups are left.
@param[in] This Pointer to the EFI_MANAGED_NETWORK_PROTOCOL instance.
@param[in] JoinFlag Set to TRUE to join this multicast group.
Set to FALSE to leave this multicast group.
@param[in] MacAddress Pointer to the multicast MAC group (address) to join or
leave.
@retval EFI_SUCCESS The requested operation completed successfully.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
* This is NULL.
* JoinFlag is TRUE and MacAddress is NULL.
* MacAddress is not a valid multicast MAC
address.
* The MNP multicast group settings are
unchanged.
@retval EFI_NOT_STARTED This MNP child driver instance has not been
configured.
@retval EFI_ALREADY_STARTED The supplied multicast group is already joined.
@retval EFI_NOT_FOUND The supplied multicast group is not joined.
@retval EFI_DEVICE_ERROR An unexpected network or system error occurred.
The MNP child driver instance has been reset to
startup defaults.
@retval EFI_UNSUPPORTED The requested feature is unsupported in this MNP
implementation.
@retval Others The requested operation could not be completed.
The MNP multicast group settings are unchanged.
**/
EFI_STATUS
EFIAPI
MnpGroups (
IN EFI_MANAGED_NETWORK_PROTOCOL *This,
IN BOOLEAN JoinFlag,
IN EFI_MAC_ADDRESS *MacAddress OPTIONAL
)
{
MNP_INSTANCE_DATA *Instance;
EFI_SIMPLE_NETWORK_MODE *SnpMode;
MNP_GROUP_CONTROL_BLOCK *GroupCtrlBlk;
MNP_GROUP_ADDRESS *GroupAddress;
LIST_ENTRY *ListEntry;
BOOLEAN AddressExist;
EFI_TPL OldTpl;
EFI_STATUS Status;
if (This == NULL || (JoinFlag && (MacAddress == NULL))) {
//
// This is NULL, or it's a join operation but MacAddress is NULL.
//
return EFI_INVALID_PARAMETER;
}
Instance = MNP_INSTANCE_DATA_FROM_THIS (This);
SnpMode = Instance->MnpServiceData->Snp->Mode;
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
if (!Instance->Configured) {
Status = EFI_NOT_STARTED;
goto ON_EXIT;
}
if ((!Instance->ConfigData.EnableMulticastReceive) ||
((MacAddress != NULL) && !NET_MAC_IS_MULTICAST (MacAddress, &SnpMode->BroadcastAddress, SnpMode->HwAddressSize))) {
//
// The instance isn't configured to do mulitcast receive. OR
// the passed in MacAddress is not a mutlticast mac address.
//
Status = EFI_INVALID_PARAMETER;
goto ON_EXIT;
}
Status = EFI_SUCCESS;
AddressExist = FALSE;
GroupCtrlBlk = NULL;
if (MacAddress != NULL) {
//
// Search the instance's GroupCtrlBlkList to find the specific address.
//
NET_LIST_FOR_EACH (ListEntry, &Instance->GroupCtrlBlkList) {
GroupCtrlBlk = NET_LIST_USER_STRUCT (
ListEntry,
MNP_GROUP_CONTROL_BLOCK,
CtrlBlkEntry
);
GroupAddress = GroupCtrlBlk->GroupAddress;
if (0 == CompareMem (
MacAddress,
&GroupAddress->Address,
SnpMode->HwAddressSize
)) {
//
// There is already the same multicast mac address configured.
//
AddressExist = TRUE;
break;
}
}
if (JoinFlag && AddressExist) {
//
// The multicast mac address to join already exists.
//
Status = EFI_ALREADY_STARTED;
}
if (!JoinFlag && !AddressExist) {
//
// The multicast mac address to leave doesn't exist in this instance.
//
Status = EFI_NOT_FOUND;
}
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
} else if (IsListEmpty (&Instance->GroupCtrlBlkList)) {
//
// The MacAddress is NULL and there is no configured multicast mac address,
// just return.
//
goto ON_EXIT;
}
//
// OK, it is time to take action.
//
Status = MnpGroupOp (Instance, JoinFlag, MacAddress, GroupCtrlBlk);
ON_EXIT:
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Places asynchronous outgoing data packets into the transmit queue.
The Transmit() function places a completion token into the transmit packet
queue. This function is always asynchronous.
The caller must fill in the Token.Event and Token.TxData fields in the
completion token, and these fields cannot be NULL. When the transmit operation
completes, the MNP updates the Token.Status field and the Token.Event is
signaled.
Note: There may be a performance penalty if the packet needs to be
defragmented before it can be transmitted by the network device. Systems in
which performance is critical should review the requirements and features of
the underlying communications device and drivers.
@param[in] This Pointer to the EFI_MANAGED_NETWORK_PROTOCOL instance.
@param[in] Token Pointer to a token associated with the transmit data
descriptor. Type EFI_MANAGED_NETWORK_COMPLETION_TOKEN
is defined in "Related Definitions" below.
@retval EFI_SUCCESS The transmit completion token was cached.
@retval EFI_NOT_STARTED This MNP child driver instance has not been
configured.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is
TRUE:
* This is NULL.
* Token is NULL.
* Token.Event is NULL.
* Token.TxData is NULL.
* Token.TxData.DestinationAddress is not
NULL and Token.TxData.HeaderLength is zero.
* Token.TxData.FragmentCount is zero.
* (Token.TxData.HeaderLength +
Token.TxData.DataLength) is not equal to the
sum of the
Token.TxData.FragmentTable[].FragmentLength
fields.
* One or more of the
Token.TxData.FragmentTable[].FragmentLength
fields is zero.
* One or more of the
Token.TxData.FragmentTable[].FragmentBufferfields
is NULL.
* Token.TxData.DataLength is greater than MTU.
@retval EFI_ACCESS_DENIED The transmit completion token is already in the
transmit queue.
@retval EFI_OUT_OF_RESOURCES The transmit data could not be queued due to a
lack of system resources (usually memory).
@retval EFI_DEVICE_ERROR An unexpected system or network error occurred.
The MNP child driver instance has been reset to
startup defaults.
@retval EFI_NOT_READY The transmit request could not be queued because
the transmit queue is full.
**/
EFI_STATUS
EFIAPI
MnpTransmit (
IN EFI_MANAGED_NETWORK_PROTOCOL *This,
IN EFI_MANAGED_NETWORK_COMPLETION_TOKEN *Token
)
{
EFI_STATUS Status;
MNP_INSTANCE_DATA *Instance;
MNP_SERVICE_DATA *MnpServiceData;
UINT8 *PktBuf;
UINT32 PktLen;
EFI_TPL OldTpl;
if ((This == NULL) || (Token == NULL)) {
return EFI_INVALID_PARAMETER;
}
Instance = MNP_INSTANCE_DATA_FROM_THIS (This);
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
if (!Instance->Configured) {
Status = EFI_NOT_STARTED;
goto ON_EXIT;
}
if (!MnpIsValidTxToken (Instance, Token)) {
//
// The Token is invalid.
//
Status = EFI_INVALID_PARAMETER;
goto ON_EXIT;
}
MnpServiceData = Instance->MnpServiceData;
NET_CHECK_SIGNATURE (MnpServiceData, MNP_SERVICE_DATA_SIGNATURE);
//
// Build the tx packet
//
MnpBuildTxPacket (MnpServiceData, Token->Packet.TxData, &PktBuf, &PktLen);
//
// OK, send the packet synchronously.
//
Status = MnpSyncSendPacket (MnpServiceData, PktBuf, PktLen, Token);
ON_EXIT:
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Places an asynchronous receiving request into the receiving queue.
The Receive() function places a completion token into the receive packet
queue. This function is always asynchronous.
The caller must fill in the Token.Event field in the completion token, and
this field cannot be NULL. When the receive operation completes, the MNP
updates the Token.Status and Token.RxData fields and the Token.Event is
signaled.
@param[in] This Pointer to the EFI_MANAGED_NETWORK_PROTOCOL instance.
@param[in] Token Pointer to a token associated with the receive
data descriptor. Type
EFI_MANAGED_NETWORK_COMPLETION_TOKEN is defined in
EFI_MANAGED_NETWORK_PROTOCOL.Transmit().
@retval EFI_SUCCESS The receive completion token was cached.
@retval EFI_NOT_STARTED This MNP child driver instance has not been
configured.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is
TRUE:
* This is NULL.
* Token is NULL.
* Token.Event is NULL
@retval EFI_OUT_OF_RESOURCES The transmit data could not be queued due to a
lack of system resources (usually memory).
@retval EFI_DEVICE_ERROR An unexpected system or network error occurred.
The MNP child driver instance has been reset to
startup defaults.
@retval EFI_ACCESS_DENIED The receive completion token was already in the
receive queue.
@retval EFI_NOT_READY The receive request could not be queued because
the receive queue is full.
**/
EFI_STATUS
EFIAPI
MnpReceive (
IN EFI_MANAGED_NETWORK_PROTOCOL *This,
IN EFI_MANAGED_NETWORK_COMPLETION_TOKEN *Token
)
{
EFI_STATUS Status;
MNP_INSTANCE_DATA *Instance;
EFI_TPL OldTpl;
if ((This == NULL) || (Token == NULL) || (Token->Event == NULL)) {
return EFI_INVALID_PARAMETER;
}
Instance = MNP_INSTANCE_DATA_FROM_THIS (This);
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
if (!Instance->Configured) {
Status = EFI_NOT_STARTED;
goto ON_EXIT;
}
//
// Check whether this token(event) is already in the rx token queue.
//
Status = NetMapIterate (&Instance->RxTokenMap, MnpTokenExist, (VOID *) Token);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
//
// Insert the Token into the RxTokenMap.
//
Status = NetMapInsertTail (&Instance->RxTokenMap, (VOID *) Token, NULL);
if (!EFI_ERROR (Status)) {
//
// Try to deliver any buffered packets.
//
Status = MnpInstanceDeliverPacket (Instance);
//
// Dispatch the DPC queued by the NotifyFunction of Token->Event.
//
NetLibDispatchDpc ();
}
ON_EXIT:
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Aborts an asynchronous transmit or receive request.
The Cancel() function is used to abort a pending transmit or receive request.
If the token is in the transmit or receive request queues, after calling this
function, Token.Status will be set to EFI_ABORTED and then Token.Event will be
signaled. If the token is not in one of the queues, which usually means that
the asynchronous operation has completed, this function will not signal the
token and EFI_NOT_FOUND is returned.
@param[in] This Pointer to the EFI_MANAGED_NETWORK_PROTOCOL instance.
@param[in] Token Pointer to a token that has been issued by
EFI_MANAGED_NETWORK_PROTOCOL.Transmit() or
EFI_MANAGED_NETWORK_PROTOCOL.Receive(). If NULL, all
pending tokens are aborted.
@retval EFI_SUCCESS The asynchronous I/O request was aborted and
Token.Event was signaled. When Token is NULL,
all pending requests were aborted and their
events were signaled.
@retval EFI_NOT_STARTED This MNP child driver instance has not been
configured.
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_NOT_FOUND When Token is not NULL, the asynchronous I/O
request was not found in the transmit or
receive queue. It has either completed or was
not issued by Transmit() and Receive().
**/
EFI_STATUS
EFIAPI
MnpCancel (
IN EFI_MANAGED_NETWORK_PROTOCOL *This,
IN EFI_MANAGED_NETWORK_COMPLETION_TOKEN *Token OPTIONAL
)
{
EFI_STATUS Status;
MNP_INSTANCE_DATA *Instance;
EFI_TPL OldTpl;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = MNP_INSTANCE_DATA_FROM_THIS (This);
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
if (!Instance->Configured) {
Status = EFI_NOT_STARTED;
goto ON_EXIT;
}
//
// Iterate the RxTokenMap to cancel the specified Token.
//
Status = NetMapIterate (&Instance->RxTokenMap, MnpCancelTokens, (VOID *) Token);
if (Token != NULL) {
Status = (Status == EFI_ABORTED) ? EFI_SUCCESS : EFI_NOT_FOUND;
}
//
// Dispatch the DPC queued by the NotifyFunction of the cancled token's events.
//
NetLibDispatchDpc ();
ON_EXIT:
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Polls for incoming data packets and processes outgoing data packets.
The Poll() function can be used by network drivers and applications to
increase the rate that data packets are moved between the communications
device and the transmit and receive queues.
Normally, a periodic timer event internally calls the Poll() function. But, in
some systems, the periodic timer event may not call Poll() fast enough to
transmit and/or receive all data packets without missing packets. Drivers and
applications that are experiencing packet loss should try calling the Poll()
function more often.
@param[in] This Pointer to the EFI_MANAGED_NETWORK_PROTOCOL instance.
@retval EFI_SUCCESS Incoming or outgoing data was processed.
@retval EFI_NOT_STARTED This MNP child driver instance has not been
configured.
@retval EFI_DEVICE_ERROR An unexpected system or network error occurred. The
MNP child driver instance has been reset to startup
defaults.
@retval EFI_NOT_READY No incoming or outgoing data was processed. Consider
increasing the polling rate.
@retval EFI_TIMEOUT Data was dropped out of the transmit and/or receive
queue. Consider increasing the polling rate.
**/
EFI_STATUS
EFIAPI
MnpPoll (
IN EFI_MANAGED_NETWORK_PROTOCOL *This
)
{
EFI_STATUS Status;
MNP_INSTANCE_DATA *Instance;
EFI_TPL OldTpl;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = MNP_INSTANCE_DATA_FROM_THIS (This);
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
if (!Instance->Configured) {
Status = EFI_NOT_STARTED;
goto ON_EXIT;
}
//
// Try to receive packets.
//
Status = MnpReceivePacket (Instance->MnpServiceData);
//
// Dispatch the DPC queued by the NotifyFunction of rx token's events.
//
NetLibDispatchDpc ();
ON_EXIT:
gBS->RestoreTPL (OldTpl);
return Status;
}
|